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Measurement of the $\overline\Lambda$ polarization in $\nu_\mu$ charged current interactions in the NOMAD experiment

P. Astier D. Autiero A. Baldisseri M. Baldo-Ceolin M. Banner G. Bassompierre 1 K. Benslama N. Besson I. Bird B. Blumenfeld F. Bobisut J. Bouchez S. Boyd a G. Bueno S A. Bunyatov L L. Camilleri A. Cardini P W. Cattaneo V. Cavasinni A. Cervera-Villanueva A. Chukanov G M. Collazuol G. Conforto C. Conta M. Contalbrigo R D. Cousins D C. Daniels H M. Degaudenzi T. del Prete A. de Santo T. Dignan L. Di Lella E Silva E. Do Couto J. Dumarchez T. Fazio 1 G J. Feldman R. Ferrari D. Ferrere V. Flaminio M. Fraternali J.M. Gaillard 1 E. Gangler A. Geiser D. Geppert D. Gibin S N. Gninenko A. Godley J J. Gomez-Cadenas J. Gosset C. Gossling M. Gouanere 1 A. Grant G. Graziani a M. Guglielmi C. Hagner J. Hernando D. Hubbard P. Hurst N. Hyett E. Iacopini C L. Joseph F R. Juget M M. Kirsanov O. Klimov J. Kokkonen A. Kovzelev A. Krasnoperov 1 D E. Kustov V. Kuznetsov S. Lacaprara C. Lachaud B. Lakic A. Lanza L. La Rotonda M. Laveder A. Letessier-Selvon J M. Levy L. Linssen A. Ljubicic J. Long A. Lupi A. Marchionni F. Martelli X. Mechain J.P. Mendiburu 1 J P. Meyer M. Mezzetto S R. Mishra G F. Moorhead D. Naumov P. Nedelec 1 Yu. Nefedov C. Nguyen-Mau D. Orestano F. Pastore L S. Peak H. Pessard 1 R. Petti A. Placci G. Polesello D. Pollmann a Yu. Polyarush B. Popov C. Poulsen P. Rathouit J. Rico P. Riemann C. Roda A. Rubbia F. Salvatore K. Schahmaneche B. Schmidt T. Schmidt M E. Sevior D. Sillou 1 F Soler Gabriella Sozzi D. Steele U. Stiegler M. Stipcevic T. Stolarczyk M. Tareb-Reyes G N. Taylor S. Tereshchenko a M. Touchard S N. Tovey M T. Tran E. Tsesmelis J. Ulrichs L. Vacavant M. Valdata-Nappi V Yu. Valuev F. Vannucci K E. Varvell M. Veltri V. Vercesi J M. Vieira T G. Vinogradova F. Weber T. Weisse F F. Wilson L J. Winton B D. Yabsley H. Zaccone K. Zuber P. Zuccon
Abstract : We present a measurement of the polarization of $\alam$ hyperons produced in $\nu_\mu$ charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same $\vo$ identification procedure and analysis method reported in a previous paper~\cite{NOMAD-polar} for the case of $\lam$ hyperons. The $\alam$ polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.
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Submitted on : Tuesday, March 12, 2002 - 4:45:58 PM
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P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, M. Banner, et al.. Measurement of the $\overline\Lambda$ polarization in $\nu_\mu$ charged current interactions in the NOMAD experiment. Nuclear Physics B, Elsevier, 2001, 605, pp.3-14. ⟨in2p3-00011302⟩

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